Pulley block



FIG. 1 is a side perspective view of a pulley block showing the new design;

FIG. 2 is another side perspective view of the pulley block of FIG. 1 seen from the opposite of FIG. 1;

FIG. 3 is a side elevational view of the pulley block showing the new design; and,

FIG. 4 is another side elevational view of the pulley block of FIG. 3 seen from the opposite of FIG. 3. 

The ornamental design for a pulley block, as shown and described. 